2011-02-14 92 views
4

我正在創建pdf文件,我想用php下載多個文件。我可以寫這樣的標題嗎?php header在循環中下載多個文件

<?php 
header('Content-type: application/pdf'); 
header('Content-Disposition: attachment; filename="downloaded.pdf"'); 
readfile('original.pdf'); 
?> 

in while loop?

+0

以防萬一有人仍在尋找解決這個問題..我在這裏找到它..blog.drinkncode.com /下載多個文件通過循環在PHP – 2016-02-11 19:49:32

回答

5

簡短的答案是否定的,你需要一些東西來告訴客戶端內容結束和新的標題開始。你可以或者使用zip實用程序並將它們打包下載,或者你可以看一下也許是一個MIME電子郵件格式(它在整個文檔中使用分隔符),但我不確定沒有明確地通過HTTP協議稱它爲「電子郵件」包。

我只是推薦使用zip實用程序。生成你需要的PDF,然後打包併發送出去。

3

不可以。HTTP不支持單個下載中的多個文件。有一些關於在HTTP消息中添加MIME風格語義的討論,因此您可以在一次傳輸中嵌入多個響應,但這並沒有到任何地方。

除非你做了類似於壓縮服務器上的多個文件並傳輸該zip的內容,否則無法爲每個請求下載多個文件。

0

不可以。該標準僅允許爲每個請求下載單個文件。如果上面提出的ZIP方法不可行,那麼您可以使用帶有JavaScript超時的基頁來將用戶重定向到每個文件,一次一個。例如:

<script type="text/javascript"> 
var file_list = new Array(
    'http://www.mydomain.com/filename1.file', 
    'http://www.mydomain.com/filename2.file', 
    'http://www.mydomain.com/filename3.file' 
); 
for (var i=0; i < file_list.length - 1; i++) { 
    setTimeout(function() { 
    document.location = file_list[i]; 
    }, i * 1000); 
} 
</script> 

<h1>Please wait</h1> 
<p>Your download will start in a moment.</p> 
+0

這是100%不可能的。更改文檔位置時。 Java腳本自動停止... – 2014-02-28 06:47:23

3

第一步:創建一個index.php文件,並添加以下代碼。

<?php 
$path = $_SERVER['DOCUMENT_ROOT']."/your_folder/"; 

$files = scandir($path); 
$count=1; 
foreach ($files as $filename) 
{ 
    if($filename=="." || $filename==".." || $filename=="download.php" || $filename=="index.php") 
    { 
     //this will not display specified files 
    } 
    else 
    { 
     echo "<label >".$count.".&nbsp;</label>"; 
     echo "<a href="download.php/?filename=".$filename."">".$filename."</a> 
"; 
     $count++; 
    } 
} 
?> 

第2步:創建一個download.php文件並添加以下代碼。

<?php 
function output_file($file, $name, $mime_type='') 
{ 
/* 
This function takes a path to a file to output ($file), the filename that the browser will see ($name) and the MIME type of the file ($mime_type, optional). 
*/ 

//Check the file premission 
if(!is_readable($file)) die('File not found or inaccessible!'); 

$size = filesize($file); 
$name = rawurldecode($name); 

/* Figure out the MIME type | Check in array */ 
$known_mime_types=array(
    "pdf" => "application/pdf", 
    "txt" => "text/plain", 
    "html" => "text/html", 
    "htm" => "text/html", 
"exe" => "application/octet-stream", 
"zip" => "application/zip", 
"doc" => "application/msword", 
"xls" => "application/vnd.ms-excel", 
"ppt" => "application/vnd.ms-powerpoint", 
"gif" => "image/gif", 
"png" => "image/png", 
"jpeg"=> "image/jpg", 
"jpg" => "image/jpg", 
"php" => "text/plain" 
); 

if($mime_type==''){ 
    $file_extension = strtolower(substr(strrchr($file,"."),1)); 
    if(array_key_exists($file_extension, $known_mime_types)){ 
    $mime_type=$known_mime_types[$file_extension]; 
    } else { 
    $mime_type="application/force-download"; 
    }; 
}; 

//turn off output buffering to decrease cpu usage 
@ob_end_clean(); 

// required for IE, otherwise Content-Disposition may be ignored 
if(ini_get('zlib.output_compression')) 
    ini_set('zlib.output_compression', 'Off'); 

header('Content-Type: ' . $mime_type); 
header('Content-Disposition: attachment; filename="'.$name.'"'); 
header("Content-Transfer-Encoding: binary"); 
header('Accept-Ranges: bytes'); 

/* The three lines below basically make the 
    download non-cacheable */ 
header("Cache-control: private"); 
header('Pragma: private'); 
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); 

// multipart-download and download resuming support 
if(isset($_SERVER['HTTP_RANGE'])) 
{ 
list($a, $range) = explode("=",$_SERVER['HTTP_RANGE'],2); 
list($range) = explode(",",$range,2); 
list($range, $range_end) = explode("-", $range); 
$range=intval($range); 
if(!$range_end) { 
    $range_end=$size-1; 
} else { 
    $range_end=intval($range_end); 
} 

$new_length = $range_end-$range+1; 
header("HTTP/1.1 206 Partial Content"); 
header("Content-Length: $new_length"); 
header("Content-Range: bytes $range-$range_end/$size"); 
} else { 
$new_length=$size; 
header("Content-Length: ".$size); 
} 

/* Will output the file itself */ 
$chunksize = 1*(1024*1024); //you may want to change this 
$bytes_send = 0; 
if ($file = fopen($file, 'r')) 
{ 
if(isset($_SERVER['HTTP_RANGE'])) 
fseek($file, $range); 

while(!feof($file) && 
    (!connection_aborted()) && 
    ($bytes_send<$new_length) 
     ) 
{ 
    $buffer = fread($file, $chunksize); 
    print($buffer); //echo($buffer); // can also possible 
    flush(); 
    $bytes_send += strlen($buffer); 
} 
fclose($file); 
} else 
//If no permissiion 
die('Error - can not open file.'); 
//die 
die(); 
} 
//Set the time out 
set_time_limit(0); 

//path to the file 
$file_path=$_SERVER['DOCUMENT_ROOT'].'/your_folder/'.$_REQUEST['filename']; 


//Call the download function with file path,file name and file type 
output_file($file_path, ''.$_REQUEST['filename'].'', 'text/plain'); 

?> 

更改「您的文件夾」與你在這兩個文件夾的名稱。

0

不適用於PHP。但你應該能夠用一些Javascript來實現這一點。

從Javascript中創建循環,以PHP頁面爲源創建新框架。

雖然有些瀏覽器會警告他們的用戶有多個文件下載,但一旦他們接受它應該可以工作。

希望這可以幫助別人尋找答案。